One of the major concerns for a 3-D package is to deal with power
supply noise. Decoupling Capacitances (decap) allocation is a powerful
technique to suppress power supply noise. In this work we integrate
noise analysis and decap estimation in the floorplanning process. We
also use the global routers results directly to estimate congestion
and tight couple global routing with floorplanning to get a better
area/congestion trade-off. Our experiments prove the quality of our
approach. We obtain improvements in both decap amount and congestion with only
small increase in area, wirelength and runtime.